Negatives:
It took a very long time to set (several weeks).
It is slow
About once every 3 hours it disconnects and you have to restart the router, disable your internet connection on every device you are using the internet and then reconnect on each device.
Sometimes the internet does not come back up for several hours.

We phoned up for a solution and they couldn't give us one, it's just a bug..

I live in London, so can't really blame being in the middle of nowhere for bad internet.